The increasing volume of renewable and intermittent generation that is being connected to power systems means that system operators need more advanced dynamic control tools to manage the increase in congestion and the resulting pressure on system constraints. The introduction of synchronised measurement technology provides the wide area real-time measurements that are essential to develop and implement adaptive online solutions for current network issues. The objective of the research presented in this thesis is to design intelligent system integrity protection schemes (SIPS) that protect transmission lines and power transformers from thermal overloading. An intelligent protection scheme should be able to identify the fault severity, predict the post disturbance trend of system states, continue monitoring specific vulnerable system variables and propose an accurate solution that is tailored to the actual system conditions and the specific contingencies that have occurred. The intent of this research is to contribute to the development of adaptive protective schemes that are enabled by modern synchronized measurement technologies for future power systems. The research presented in this thesis focuses on the creation of novel Operational Tripping Schemes (OTSs) that explicitly satisfy both the functionality and economical requirements by integrating an improved assessment of thermal behaviour of the monitored assets. Novel OTSs are proposed for both transmission lines and transformers and they can be considered to be intelligent, adaptive and efficient SIPS for the thermal protection of system assets. A novel functional block is proposed that be included within the OTS and that uses optimization theory to determine the lowest cost solution to overheating in the time available. Furthermore, case studies have been conducted to verify the performance of each novel OTS using simulations of a full GB system model.

La lutte contre la corruption constitue, depuis une vingtaine d'année, une priorité, tant pour les États que du point de vue international. D'abord, fondée sur le blanchiment de capitaux, notamment issus de trafics de stupéfiants et du terrorisme, la lutte contre la corruption tend désormais à devenir autonome. Le secteur bancaire et financier par lequel transitent des flux financiers licites et illicites, et qui a subi des crises et scandales considérables dans les dernières années, paraît susceptible d'être le réceptacle d'opérations de corruption, sans pour autant que cette question n'ait été ni pensée, ni ait formé véritablement le socle d'une action résolue des instances internationales et nationales. Il devenait, dès lors, nécessaire de s'interroger sur le système d'intégrité bancaire et financier (SIBF), dans ses versants préventif et répressif. Il en est ressorti que ce dernier, à l'instigation d'organisations internationales et consécutivement à des traumatismes politiques et financiers, a subi en quelques années une importante évolution. Ce développement a conduit, d'abord, au renforcement des dispositifs de prévention dans les établissements bancaires et financiers. Il a, ensuite, offert de nouvelles ressources au système judiciaire, par exemple, à travers le procureur de la République financier et l'enrichissement de ses méthodes d'enquêtes. Le SIBF, cependant, éprouve des difficultés graves pour contrer efficacement les menaces de la corruption qui restent en mouvement constant. Aussi conviendrait-il que les pouvoirs publics mettent résolument en œuvre des politiques publiques fortes dans le domaine, qui pourraient s'inspirer des propositions formulées à la fin de cette thèse. / For about twenty years, on a State and international basis, the fight against corruption has constituted a priority. Originally based on money laundering, essentially from drug trafficking and terrorism, the fight against corruption is nowadays tending to become autonomous. In the past years, the banking and financial sector, transited by lawful and illicit financial flows, has not been able to avoid considerable crises and scandals. This sector seems to be a haven for corruption operations ; though, this question has never really been taken into account, nor being thought as to form a common base for a resolute international and national response. It then becomes necessary to wonder about the banking and financial integrity system (SIBF), in both its preventive and repressive sides. At the instigation of international organisations and responsivly to political and financial traumatisms, the SIBF has undertaken a tremendous development. This evolution led, first, to the strengthening of the prevention mechanisms in the banking and financial institutions. It also offered new developments for the judiciary means, such as the instauration of the national financial prosecutor and the enrichment of his means of investigation. However, the SIBF presents serious difficulties for efficiently countering the constantly moving and evolving corruption threats. It would be then necessary that the concerned authorities implement resolutely strong public policies in this domain, which could be inspired by the proposals formulated at the end of this thesis.